It covers part of the Ebro valley towards its north and the Iberian Range in the south. The community is a single province, so there is no County Council, and it is organized into 174 municipalities. It borders the Basque Country (province of Álava) to the north, Navarre to the northeast, Aragón to the southeast (province of Zaragoza), and Castilla y León to the west and south (provinces of Burgos and Soria).

The area was once occupied by pre-Roman Berones, Pellendones and Basques. After partial recapture from the Muslims in the early tenth century, the region became part of the Kingdom of Pamplona, later being incorporated into Castile after a century and a half of disputes. From the eighteenth century the Rioja region remained divided between the provinces of Burgos and Soria, until in 1833 the province of Logroño was created, changing the name of the province to La Rioja in 1980 as a prelude to its constitution under a single provincial autonomous community in 1982. The name "Rioja" (from Río Oja) is first attested in 1099.

The region is well known for its wines under the brand Denominación de Origen Calificada Rioja.

In Roman times the territory of La Rioja was inhabited by the tribes of the Berones (central country), Autrigones (upper country, extending also north and west of it) and the Vascones (lower country, extending also north and east of it). It was part of the province of Hispania Tarraconensis.

In medieval times La Rioja was often a disputed territory. The Visigoths created the Duchy of Cantabria that probably included most of La Rioja, as a border march against the Vascones. The area was invaded by the Muslims at the beginning of the eighth century. After the Muslim invasion of 711, La Rioja fell into the Muslim domains of Al Andalus.

Most of the territory was reconquered in 923 by Sancho I of Pamplona, acting for the Kingdom of Pamplona together with the Kingdom of León and the Counts of Castile, feudal lords of the Leonese King. The lower region around Arnedo came under control of his allies the Banu Qasi of Tudela. The territory to the east of the Leza River remained under Muslim control.

Later there was a dispute between the Castilian Count Fernán González and the kings of Pamplona-Navarra, involving great battles. It was decided in favour of the Navarrese after the imprisonment of the Count's family in Cirueña, in 960.[1] La Rioja briefly formed the independent Kingdom of Viguera from 970 to about 1005, at which point it became a part of the Kingdom of Pamplona.

Sancho Garcés moved the capital of the Kingdom of Pamplona to Nájera (La Rioja), creating the so-called kingdom of Nájera-Pamplona which was, due to its large size, the first Spanish Empire. After the independence of Castile in 1035, this new kingdom fiercely fought against Pamplona for the possession of Bureba, La Rioja and other territories. In 1076, after the murder of Sancho VI, Navarre was divided among Castile and Aragon. Castile obtained La Rioja, together with other Navarrese lands.[1] The name "La Rioja" first appears in written records in the Miranda de Ebro charter of 1099. The territory was centred on the fortified site of Logroño: the 12th-century church Iglesia de Santa Maria de Palacio recalls its origin as a chapel of the administrative palace. Logroño was a borderland disputed between the kings of Navarre and the kings of Castile from the 10th century;

Up to the 19th century the territory remained divided between the provinces of Burgos and Soria. The region was taken by Napoleonic forces in the Peninsular War and remained solidly in French hands until 1814. In the 1810 project of Llorente it was to be a part of the prefecture of Arlanzón with its capital in Burgos. The Constitutional Cortes declared La Rioja an independent province at the time of the Liberal Constitution of 1812, and during the Liberal Triennium in January 1822 the province of Logroño was created by royal decree as part of the administrative reform of Riego, taking in the whole of the historical territory of La Rioja. However, Ferdinand VII soon annulled these decisions and restored most of the previous territorial divisions. In the 1833 reorganization, a province of Logroño was again formed within the region of Castilla la Vieja. The province increased its territory temporarily in 1841.

In 1980 the province changed its name to La Rioja, and following the adoption of the Estatuto de San Millán in 1982, during the reorganization following the Spanish transition to democracy, it was constituted as a uni-provincial autonomous community,[2] owing to its economic distinction from the surrounding regions. It is the second-smallest autonomous community in Spain and has the smallest population; half of its 174 municipalities have populations under 200. Nearly half of its citizens live in the capital.

The climate is mainly continental. The Rioja Alta comarca receives more precipitation than Rioja Baja. The average temperature ranges from 11.8–31.8 °C (53.2–89.2 °F) and the precipitation ranges between 300–600 mm (12–24 in) as an annual average. The wind called Cierzo is very frequent around La Rioja during the winter.

The Ebro is the main river passing through the community. Emerging from the narrow channel between the rocks of the Conchas de Haro, it reaches La Rioja, through which it runs for 120 km (75 miles), before continuing its journey to the Mediterranean. In the Conchas de Haro the altitude of the river is 445 m (1,460 ft) and when it leaves the community, in the Sotos del Ebro Natural Reserve in Alfaro, it is 260 m (850 ft) high. The river therefore flows very quickly through La Rioja.[original research?]

Seven rivers descend rapidly towards the Ebro from the mountain range, which is why La Rioja is sometimes called: "Zone of the seven valleys". They are, from east to west, Alhama, Cidacos, Leza, Iregua, Najerilla, Oja and Tirón, although the headwaters of the Alhama and Cidacos originate in Soria and those of Najerilla-Neila and Tirón are from Burgos. Sometimes Linares (a tributary of Alhama) is added, grouping Tirón with its tributary, the Oja.

All the rivers of these valleys form tributaries that go on to form many valleys in their own right, such as those of Linares, Ocon, Jubera, Tuerto, Brieva, Viniegras and San Millán. There is an almost unlimited number of grandiose canyons, quite splendid in nature, such as Aguas Buenas, Nieva, Manzanares, Ardancha, Navajún, Valderresa, Ollora, Tobia, San Martín and others.

In the highlands oaks, beech and pine are grown. There are also thickets of juniper, boxwood, sloes, holly and cistus. Thyme, rosemary, common juniper, and holm oak are present. There are grand hillsides with fine pasture for livestock, cattle and sheep. In the lower areas there are oaks, olive and almond trees. Near the Ebro, in the plains, the land is used for cereal, sugar beet and potatoes, while the hills are covered with vast vineyards of the wine that has brought worldwide fame to this region.

All Riojan rivers, including the Ebro, have a row of poplars and cottonwood. About the Riojan Alamos Ana Maria Matute has written: "... see them on the edge of the water, turning the landscape, like spears magical pointing towards the unreal and mysterious country of the riverbed."[3]

During the Early Cretaceous period the geographical area of Cameros was part of a flooded plain that drained periodically, leaving behind muddy areas where dinosaur tracks marked the path. Eventually they were dried and covered with new sediment layers whose weight pressed down on the lower layers, causing them to solidify into rocks over millions of years. Erosion has been wearing down the upper layers making many of these rock formations visible, bringing into view the fossilized footprints. La Rioja is notable for the number and conservation of these sites, in addition to those found in the north of Soria, such as Yanguas, Santa Cruz de Yanguas and other highland locations.[4]

According to the INE the population of La Rioja (as at 2010) is 322,415 inhabitants, with 161,884 men and 160,531 women, which is 713 more than in 2009. Its population density is 63.76 people per km2.[5] It is the least populous autonomous community in Spain. Its capital, Logroño, with approximately 152,500 inhabitants, is its most populous city.

La Rioja has 174 municipalities. According to the same INE data, there are more men than women in 150 of them, in two the numbers are the same and in 22 there are more females than males. In the latter set, the differences are small, except in the capital where there are 4,868 more women than men.

According to the 2007 PISA report, education in La Rioja is of the highest quality in Spain, close to that of other European countries with better overall educational levels in terms of student knowledge. In the Ministry of Education's 2009 report La Rioja was in first position among the autonomous communities as it relates to general aspects of primary and secondary education.[7]

It is placed above the Spanish average in the list of communities with the lowest levels of school failure, with 85% of students being able to obtain the ESO title, despite its schools having the highest proportion of enrolled immigrants.[8]

6208 euros are spent per pupil, making it the tenth ranked community in this regard.[7] The majority of educational institutions in the community are public, followed by subsidized and private schools, the latter of which are very scarce at the primary and secondary levels. The bachillerato is free in public schools and at a cost in charter schools.[9]

Rail journeys to Madrid, Zaragoza, Barcelona, Valladolid, Oviedo, Bilbao, La Coruña, Vigo are possible, since the Castejón-Miranda line crosses the region from east to west. The main railway station is that at Logroño.

Road communications between La Rioja and neighboring regions are primarily through the AP-68. Additional highways have been built, such as the Autovía A-12 which connects Pamplona to Logroño from 2006, and in the future will reach Burgos. Other major road routes include: